v0.5.0

This release completes documentation for schema and adds support for tproxy,
synproxy and flow/flowtable statements/objects.

⚠️ Breaking Changes

• Enum stmt::Statement:
  • adds variants Flow, SynProxy and TProxy,
  • removes variant CounterRef,
  • receives a #[non_exhaustive] mark.
• Struct stmt::Counter became enum.
• Enum schema::NfListObject adds variant SynProxy.
• Removed functions schema::Table::new(), schema::Table::new() and schema::Rule::new().

⛰️ Features

• (schema) [breaking] Add default impl, add doc comments - (abd3156)
• (schema) Qualify limit's per-attribute as time unit enum - (42c399d)
• (stmt) Implement flow statement - (a3209cb)
• Add synproxy statement and list object - (0108fbf)

🐛 Bug Fixes

• (stmt) [breaking] Fix named counter - (9f109c5)
• Add doc comment and trait derive to counters - (617b071)
• [breaking] Store NfListObjects in heap - (51ccf10)

📚 Documentation

• (lib) Add library description - (2e98483)
• (readme) Add @JKRhb as maintainer - (021abc1)
• (visitor) Fix doc comment syntax - (d8e0c68)
• Fix long doc comments in expr, stmt - (290c5bb)
• Add doc comments for tproxy - (e13a5ed)

🧪 Testing

• (schema) Add set and map nft/json test - (03db827)
• (stmt) Add serialization test for flow, flowtable - (fd88573)
• Refactor nftables-json test script with unshare - (3799022)
• Add test for synproxy - (910315b)
• Re-convert json data from nftables files - (1ca5421)